Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the safety profile is clear. However, the description adds no behavioral context such as return format, potential errors, or authentication requirements, leaving the agent without crucial operational information.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.